データシートサーチシステム
  Japanese  ▼
ALLDATASHEET.JP

X  

U3280M データシート(PDF) 4 Page - ATMEL Corporation

部品番号 U3280M
部品情報  Transponder Interface for Microcontroller
Download  19 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
メーカー  ATMEL [ATMEL Corporation]
ホームページ  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

U3280M データシート(HTML) 4 Page - ATMEL Corporation

  U3280M_11 Datasheet HTML 1Page - ATMEL Corporation U3280M_11 Datasheet HTML 2Page - ATMEL Corporation U3280M_11 Datasheet HTML 3Page - ATMEL Corporation U3280M_11 Datasheet HTML 4Page - ATMEL Corporation U3280M_11 Datasheet HTML 5Page - ATMEL Corporation U3280M_11 Datasheet HTML 6Page - ATMEL Corporation U3280M_11 Datasheet HTML 7Page - ATMEL Corporation U3280M_11 Datasheet HTML 8Page - ATMEL Corporation U3280M_11 Datasheet HTML 9Page - ATMEL Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 4 / 19 page
background image
4
Atmel U3280M [DATASHEET]
4688E–RFID–05/13
3.
Functional Description
3.1
Transponder Interface
The Atmel® U3280M is a transponder interface IC that can operate microcontrollers using wireless technology and battery
independently. Wireless data communication and the power supply are handled via an electromagnetic field and the coil
antenna of the transponder interface. The Atmel U3280M consists of a rectifier stage for the antenna, power management to
handle field and battery power supplies, a damping modulator, and a field-gap detection stage for contactless data
communication. Furthermore, a field clock extraction and an EEPROM are on-chip.
The internal rectifier stage rectifies the AC from the LC-resonant circuit at the coil inputs and supplies the Atmel U3280M device
and an additional microcontroller device with power. It is also possible to supply the device via the VBatt input with DC from a
battery. The power management handles switching between battery supply (VBatt pin) and field supply automatically. It switches
to field supply if a field is applied at the coil, and it switches back to battery if the field is removed. The voltage from the coil or
the VBatt pin is output at the VDD pin to supply the microcontroller or any other suited device. At the VDD pin a capacitor must be
connected to smooth and buffer the supply voltage. This capacitor is also necessary to buffer the supply voltage during
communication (damping and gaps in the field).
For communication, the chip contains a damping stage and gap-detect circuitry. By means of the damping stage the coil voltage
can be modulated to transmit data via the field. It can be controlled with the modulator input (MOD pin) via the microcontroller.
The gap-detection circuitry detects gaps in the field and outputs the gap/field signal at the gap-detect output (pin NGAP).
To store data like keycodes, identifiers and configuration bits, a 512-bit EEPROM is available on-chip. It can be read and written
by the microcontroller via a two-wire serial interface.
The serial interface, the EEPROM and the microcontroller are supplied with the voltage at the VDD pin. That means the
microcontroller can read and write the EEPROM if the supply voltage at VDD is in the operating range of the IC.
The Atmel U3280M has built-in operating modes to support a wide range of applications. These modes can be activated via the
serial interface with special mode control bytes.
To support applications with battery supply only, power management can be switched off by software to disable the automatic
switching to field supply.
An on-chip Bi-phase and Manchester modulator can be activated and controlled by the serial interface. If this modulator is used,
it modulates the serial data stream at the serial inputs SDA and SCL into a Bi-phase or Manchester-coded signal for the
damping stage.
3.2
Modulation
The transponder interface can modulate the magnetic field by its damping stage to transmit data to a base station. It modulates
the coil voltage by varying the coil’s load. The modulator can be controlled via the MOD pin. A high level (“1”) increases the
current into the coil and damps the coil voltage. A low level (“0”) decreases the current and increases the coil voltage. The
modulator generates a voltage stroke of about 2 Vpp at the coil. A high level at the MOD pin makes the maximum of the field
energy available at VDD. During reset mode, a high level at the MOD pin causes optimum conditions for starting the device and
charging the capacitor at VDD after the field has been applied at the coil.
3.2.1
Digital Input to Control the Damping Stage (MOD)
MOD = 0: coil not damped
MOD = 1: coil damped
VCMS = VCID: modulation voltage stroke at coil inputs
Note:
If the automatic power management is disabled, the internal front-end VDD is limited at VDDC. In this case the value
VDDC must be used in the above formula.
V
coil-peak
V
DD
2V
CMS
V
CU
=
+
×
=
V
coil-peak
V
DD
2
×
V
CD
==


同様の部品番号 - U3280M_11

メーカー部品番号データシート部品情報
logo
ATMEL Corporation
U3280M-NFBG3Y ATMEL-U3280M-NFBG3Y Datasheet
349Kb / 21P
   Transponder Interface for Microcontroller
U3280M-NFBY ATMEL-U3280M-NFBY Datasheet
349Kb / 21P
   Transponder Interface for Microcontroller
U3280M ATMEL-U3280M_07 Datasheet
349Kb / 21P
   Transponder Interface for Microcontroller
More results

同様の説明 - U3280M_11

メーカー部品番号データシート部品情報
logo
ATMEL Corporation
U3280M ATMEL-U3280M_07 Datasheet
349Kb / 21P
   Transponder Interface for Microcontroller
U3280M ATMEL-U3280M Datasheet
275Kb / 18P
   TRANSPONDER INTERFACE FOR MICROCONTROLLER
U9280M-H ATMEL-U9280M-H_05 Datasheet
444Kb / 24P
   Microcontroller with Transponder Interface
logo
Texas Instruments
RF430CL330H TI1-RF430CL330H Datasheet
438Kb / 33P
[Old version datasheet]   DYNAMIC NFC INTERFACE TRANSPONDER
logo
ATMEL Corporation
U9280M-H ATMEL-U9280M-H Datasheet
417Kb / 23P
   MICROCONTROLER WITH TRANSPONDER INTERFACE
logo
Texas Instruments
RF430CL330H TI1-RF430CL330H_14 Datasheet
906Kb / 47P
[Old version datasheet]   Dynamic NFC Interface Transponder
RF430CL330H-Q1 TI1-RF430CL330H-Q1 Datasheet
776Kb / 45P
[Old version datasheet]   Automotive Dynamic NFC Interface Transponder
RF430CL331H TI1-RF430CL331H Datasheet
799Kb / 60P
[Old version datasheet]   NFC Type 4B Dynamic Dual Interface Transponder
logo
TOKO, Inc
SA3D14 TOKO-SA3D14 Datasheet
97Kb / 1P
   Transponder Coils for Surface Mounting
SA3M08 TOKO-SA3M08_16 Datasheet
252Kb / 1P
   Transponder Coils for Surface Mounting
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19


データシート ダウンロード

Go To PDF Page


リンク URL




プライバシーポリシー
ALLDATASHEET.JP
ALLDATASHEETはお客様のビジネスに役立ちますか?  [ DONATE ] 

Alldatasheetは   |   広告   |   お問い合わせ   |   プライバシーポリシー   |   リンク交換   |   メーカーリスト
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com